src/jdk.jpackage/macosx/classes/jdk/jpackage/internal/MacAppImageBuilder.java

@@ -321,12 +321,12 @@
 
         // create additional app launcher(s) and config file(s)
         List<Map<String, ? super Object>> entryPoints =
                 StandardBundlerParam.ADD_LAUNCHERS.fetchFrom(params);
         for (Map<String, ? super Object> entryPoint : entryPoints) {
-            Map<String, ? super Object> tmp = new HashMap<>(originalParams);
-            tmp.putAll(entryPoint);
+            Map<String, ? super Object> tmp = 
+                    AddLauncherArguments.merge(originalParams, entryPoint);
 
             // add executable for add launcher
             Path addExecutable = macOSDir.resolve(getLauncherName(tmp));
             try (InputStream is = getResourceAsStream("jpackageapplauncher");) {
                 writeEntry(is, addExecutable);